Divisione Marina

For over 20 years serving the naval sector.

Fidema operates in various sectors such as the management of coordination plans, the hull design, plans for engine equipment, Air Conditioning and HVAC, tagging plans. To these proposals we added the important analysis phase F.E.M, C.F.D. and the Non-Destructive Testing Department.
We have a wide experience in the construction of products for the naval sector, from the side doors to the tender platforms, from the stabilization boxes to the bases, all in order to customize and make efficient the naval construction sector.

  • head
  • Basic Design
  • Functional Engineering
  • Structural Design
  • FEM, CFD and Stability
  • HVAC
  • ACS Trunk
  • Coordination Plans
  • Tagging
  • Non Distructive Test
Basic Design

As a naval engineering Company, Fidema Progetti S.r.l. is able to follow the shipowner from the very early stages of concept and feasibility, going through the general plans, the technical ship specification, retain the relationships with the naval registers and then the approvals of class documents and then move to the hull office and preparation of all the information for the realization of the workshop documents up to the on-board tests and any customer assistance.
For small projects such as pontoons, tankers etc … Fidema Progetti S.r.l. manages the whole process within it. For larger projects such as ferries, cruise ships, etc., the company relies on sub-contractor engineering companies to provide adequate resources to achieve the objectives.
These are the activities or documents we can perform for the first phase or the Basic Design:
• Conceptual and feasibility studies
• Dimension optimization
• Preliminary technical specification
• Ship technical specification
• SRTP feasibility studies
• General arrangement plan
• Capacity plan
• Ship weight evaluation
• Wheelhouse visibility
• Tonnage calculations
• Equipment number calculations
• Navigation lights arrangement
• Preliminary stability calculations
• Resistance and power prediction
• Engine room arrangement
• Structural general arrangement
• 3D prototyping

Functional Engineering

These are the activities or documents that we can perform for the second phase or the Functional:
• Intact and damage stability booklets
• Hull classification drawings according to class. societies rules with structural analisys
• Piping & Instruments Diagrams according to class. societies rules
• SRTP Assessment
• Pipes pressure loss calculations and head pressure pumps check
• Pipes transient analisys (Water hammer, Cavitation pockets …)
• Hvac diagrams including thermal and pressure loss calculations
• Ship’s safety plans (LSA, Fire plan, Escape plan …)
• Outfitting design including main, fwd and aft masts, hatches, supports and equipment foundations
• Machineries and equipments foundations
• Hull sections and blocks Lifting plans

Furthermore Fidema Progetti S.r.l. gives design assistance to Meg Industry S.r.l. for the realization and turnkey delivery of the following plants and machinery:
• Side doors
• Boarding platforms
• Passenger access platforms
• Provisional lifts and elevators

Structural Design

FEM, CFD and Stability

Fidema Progetti S.r.l. is able to perform F.E.M. simulating a wide range of physical scenarios related to the thermal and structural behavior of a product. F.E.M. technology allows you to explore countless configurations of a project, in extremely short times and costs compared to traditional methods. Instead of realizing several real prototypes, virtual models are tested; these can be modified faster and give the designer much more information. The software cad ANSYS SpaceClaim Direct Modeler allows you to simplify the work of preparing the 3D geometry to be passed to ANSYS Mechanical Premium with which the calculations will then be processed.
In particular we elaborate:
• Static and dynamic structural analysis
• Buckling analysis
• Fatigue analysis
• Modal analysis
• Dynamic simulations of rigid bodies
• Multi-material simulations
• Parametric simulations
Software used:
• ANSYS Mechanical Premium
• ANSYS SpaceClaim Direct Modeler

Fidema Progetti is able to perform CFD simulations going to virtually test a project before performing long and expensive experimental tests. The possibility to try numerous virtual configurations allows to find the best solution at low costs.
We can develop simulations to verify:
• Resistance to motion
• Lift
• Losses of load
• Particle traking
Software used:
• OpenFOAM

Fidema Progetti S.r.l. is able to perform the stability calculations of intact and damaged ship starting from the generation or import of the hull surfaces and the implementation of the compartments.
We are also able to follow the phases for ship weighing and ship inclining tests.
These are the documents that are written:
• Inclining test report
• Intact stability booklet
• Damage stability booklet
Software used:
• AVEVA Marine Initial Design


ACS Trunk

Thanks to over twenty years experience, Fidema has consolidated a great SKILL in the coordination of air conditioning stations both in the naval and civil sectors.
The project takes shape with the development of the arrangement based on the process flow and thermal calculations up to the emission of the assembly plans.
The documents used are usually P & ID, single line air conditioning and functional diagrams of all the plants present in ACS.
We provide 3D models developed with Microstation or Autocad, printing tables on any format and accessory lists of all the systems present.

Coordination Plans

In this context, we develop general plans, functional diagrams, pipe sketching, material lists, the cutting of ducts and pipes, the coordinated plans inside and outside the engine, positioning machines, quality controls, inspections and service on board.

The co-ordination of the routes of pipes and hollow roads takes place in a three-dimensional environment, ensuring the correct sizing and positioning of the accessories to be applied externally to the air handling units, through the preparation of project documents.

Reference models for water systems are also provided, designed to serve the air-conditioning batteries, through valve groups and sensors.
Checks are also performed for the sizing and design of additional support structures such as racks and supports. In addition to this we provide detailed installation plans drawn from three-dimensional models.

For the inside engines systems:
– checking and placing of the machine units
– foundation equipments and lifting systems realization
– coordination of the plants by the P&ID
– constructive drawings for the carpentry
– materials supply list (BOM)
– assembly plans


Pipelines tagging is one of the most important activities that Fidema carries out before the on-board assembly phase.
This activity takes shape from the coordinated plans to find out the pipelines that must be identified and divided into individual elements for production and assembly.
Each pipeline must be precisely identified according to customer specifications, which may vary depending on the thickness of the sheets, flanges, materials and weights. During the cutting phase (tagging), the hull interfaces and potential interferences between services are also checked.
Another fundamental aspect is that of identifying all the different accessories that must be installed in line such as dampers, regulators, post RH.

Non Distructive Test

Thanks to a team of specialized technicians, Fidema Group can perform the following tests:

– Visual controls
The visual controls are particularly important from the moment in which, through the use of sophisticated optical equipment and electronic image processing, the evaluation of the result is performed by the operator in compliance with the tolerance rules for component-specific defects.

– Controls with penetrating liquids
Penetration tests are fast, economical and widely used methods for detecting surface break points on non-porous materials (metals, plastics or ceramics). The test is based on the principle of capillary action of the liquid that enters the cavity. The test is performed by cleaning the surface to be tested, applying the colored or fluorescent test liquid followed by the restoration of the identified problem.

– Ultrasound test
The properties of ultrasound are used to identify the weakness of the material in some points or any internal discontinuities.
It is an extremely sensitive test method to trace even the most hidden and internal defects.